94 lines
2.2 KiB
JavaScript
94 lines
2.2 KiB
JavaScript
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import { flap as flap_ } from './Functor';
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import { pipe } from './function';
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// TODO: curry in v3
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/**
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* Extracts a value at a relative position which depends on the current value.
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*
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* @since 2.0.0
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*/
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export function tracks(M, f) {
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return function (wa) { return wa(f(wa(M.empty))); };
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}
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/**
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* Get the current position
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*
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* @since 2.0.0
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*/
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export function listen(wa) {
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return function (e) { return [wa(e), e]; };
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}
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/**
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* Get a value which depends on the current position
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*
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* @since 2.0.0
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*/
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export function listens(f) {
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return function (wa) { return function (e) { return [wa(e), f(e)]; }; };
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}
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/**
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* Apply a function to the current position
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*
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* @since 2.0.0
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*/
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export function censor(f) {
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return function (wa) { return function (e) { return wa(f(e)); }; };
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}
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/**
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* @category instances
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* @since 2.0.0
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*/
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export function getComonad(monoid) {
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function extend(wa, f) {
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return function (p1) { return f(function (p2) { return wa(monoid.concat(p1, p2)); }); };
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}
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function extract(wa) {
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return wa(monoid.empty);
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}
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return {
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URI: URI,
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_E: undefined,
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map: _map,
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extend: extend,
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extract: extract
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};
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}
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/* istanbul ignore next */
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var _map = function (fa, f) { return pipe(fa, map(f)); };
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/**
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* `map` can be used to turn functions `(a: A) => B` into functions `(fa: F<A>) => F<B>` whose argument and return types
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* use the type constructor `F` to represent some computational context.
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*
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* @category mapping
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* @since 2.0.0
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*/
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export var map = function (f) { return function (fa) { return function (p) { return f(fa(p)); }; }; };
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/**
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* @category type lambdas
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* @since 2.0.0
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*/
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export var URI = 'Traced';
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/**
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* @category instances
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* @since 2.7.0
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*/
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export var Functor = {
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URI: URI,
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map: _map
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};
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/**
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* @category mapping
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* @since 2.10.0
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*/
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export var flap = /*#__PURE__*/ flap_(Functor);
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// -------------------------------------------------------------------------------------
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// deprecated
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// -------------------------------------------------------------------------------------
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/**
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* Use [`Functor`](#functor) instead.
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*
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* @category zone of death
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* @since 2.0.0
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* @deprecated
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*/
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export var traced = Functor;
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